%% dx = (0.125,0.125)
solution = [
0 0 -8.23994e-18 -1.56866e-17 -6.57161e-17 2.18115e-15 -5.36531e-15 1.04883e-15 0 
1.6263e-18 0.000214763 0.00091336 0.00207243 0.00359211 0.00517548 0.00821407 0.0117134 0.015625 
-5.89806e-17 0.000922256 0.00380765 0.00866708 0 0 0.0340337 0.0474288 0.0625 
1.73472e-17 0.00210802 0.00863415 0 0 0 0.0784323 0.107347 0.140625 
-6.93889e-18 0.00375848 0.015254 0 0 0 0.140319 0.191222 0.25 
7.63278e-15 0.00597268 0.0241263 0.0544603 0.0972047 0.152338 0.219528 0.298959 0.390625 
-1.73472e-15 0.00870123 0.0349785 0.0788491 0.140376 0.219548 0.316279 0.430596 0.5625 
8.32667e-17 0.0119202 0.0477685 0.107554 0.191294 0.298984 0.430602 0.586149 0.765625 
0 0.015625 0.0625 0.140625 0.25 0.390625 0.5625 0.765625 1 
];
exact = [
0 0 0 0 0 0 0 0 0 
0 0.000244141 0.000976562 0.00219727 0.00390625 0.00610352 0.00878906 0.0119629 0.015625 
0 0.000976562 0.00390625 0.00878906 0 0 0.0351562 0.0478516 0.0625 
0 0.00219727 0.00878906 0 0 0 0.0791016 0.107666 0.140625 
0 0.00390625 0.015625 0 0 0 0.140625 0.191406 0.25 
0 0.00610352 0.0244141 0.0549316 0.0976562 0.152588 0.219727 0.299072 0.390625 
0 0.00878906 0.0351562 0.0791016 0.140625 0.219727 0.316406 0.430664 0.5625 
0 0.0119629 0.0478516 0.107666 0.191406 0.299072 0.430664 0.586182 0.765625 
0 0.015625 0.0625 0.140625 0.25 0.390625 0.5625 0.765625 1 
];
err = [
0 0 -8.23994e-18 -1.56866e-17 -6.57161e-17 2.18115e-15 -5.36531e-15 1.04883e-15 0 
1.6263e-18 -2.93773e-05 -6.32027e-05 -0.000124832 -0.00031414 -0.000928033 -0.000574996 -0.000249442 0 
-5.89806e-17 -5.43066e-05 -9.86017e-05 -0.000121984 0 0 -0.00112251 -0.000422772 0 
1.73472e-17 -8.92473e-05 -0.000154913 0 0 0 -0.000669273 -0.000319136 0 
-6.93889e-18 -0.000147769 -0.000370996 0 0 0 -0.000305997 -0.0001845 0 
7.63278e-15 -0.000130834 -0.000287732 -0.000471324 -0.000451581 -0.000250048 -0.000198928 -0.000112865 0 
-1.73472e-15 -8.78355e-05 -0.000177772 -0.000252414 -0.00024864 -0.000178397 -0.0001268 -6.80337e-05 0 
8.32667e-17 -4.27358e-05 -8.31075e-05 -0.000111922 -0.000112166 -8.81015e-05 -6.18427e-05 -3.24691e-05 0 
0 0 -1.83187e-15 8.27116e-15 1.15463e-14 -9.99201e-16 2.33147e-15 0 0 
];
